package com.sky.controller.user;


import com.sky.result.Result;
import com.sky.service.DishService;
import com.sky.vo.DishVO;
import io.swagger.annotations.Api;
import io.swagger.annotations.ApiOperation;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

import java.util.List;

@RestController("userDishController")
@RequestMapping("/user/dish")
@Slf4j
@Api(tags = "C端-菜品浏览接口")
public class DishController {
    @Autowired
    private DishService dishService;
    @Autowired
    private RedisTemplate redisTemplate;
    @GetMapping("/list")
    @ApiOperation("根据分类id查询菜品")
    public Result<List<DishVO>> getDishByCategoryId(Integer categoryId){
        // 构造redis的key,规则dish_分类Id
        String key = "dish_" + categoryId;
        log.info("根据分类id查询菜品,{}",categoryId);
        // 查询redis中是否存在菜品数据
        List<DishVO> list = (List<DishVO>) redisTemplate.opsForValue().get(key);

        if (list != null && list.size() > 0){
            // 存在直接返回 无需查询数据库
            return Result.success(list);
        }

        // 如果不存在，查询数据库，将查询到的数据库redis中
        list = dishService.getDishByCategoryId(categoryId);
        redisTemplate.opsForValue().set(key,list);
        return Result.success(list);
    }
}
